Hi again,
I believe I've fixed the issue, there were a few problems with the ripple code that calculated the position that was touched, among other things. The fix will be present in v1.1.3 (which we're submitting within the next few hours!).
I tested it with a few different setups, but it seemed to work well with the canvas about 5-10m away from the camera, scaled at about 0.01 (I used a width/height of 1280x720, but you can obviously change this to whatever you need to fit the UI stuff). A CanvasScaler with a dynamic pixels-per-unit of 1.3-1.7 and reference pixels-per-unit of 100 makes things look a tad crisper, too.
Please do note that a lot of the elements (such as MaterialDropdowns and TabViews) still don't work with world space canvas (so they aren't really VR ready yet), but before our next large update (v1.2.0) I'll go through every component and make everything as compatible as possible :)
~ Declan.